Biography: Nicole DeBoer (born 20 December 1970, Toronto, Canada) is a Canadian actress. She is married to John Kastner.

DeBoer's most noted role is that of Ezri Dax on Star Trek: Deep Space Nine (seventh season, 1999), though she has also featured in the Kids in the Hall movie, Brain Candy (1996), and the critically-received science fiction film, Cube (1997). She also starred in the Canadian-made science fiction series Deepwater Black (aka Mission Genesis), and in episodes of the Canadian produced SF series The Outer Limits). She currently stars as Sarah Bannerman in the television series The Dead Zone.